diff options
Diffstat (limited to 'drivers/mailbox/imx-mailbox.c')
| -rw-r--r-- | drivers/mailbox/imx-mailbox.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c index 7906624a731c..97bf0acf51d8 100644 --- a/drivers/mailbox/imx-mailbox.c +++ b/drivers/mailbox/imx-mailbox.c @@ -12,6 +12,7 @@ #include <linux/mailbox_controller.h> #include <linux/module.h> #include <linux/of_device.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #define IMX_MU_xSR_GIPn(x) BIT(28 + (3 - (x))) @@ -287,6 +288,7 @@ static int imx_mu_startup(struct mbox_chan *chan) struct imx_mu_con_priv *cp = chan->con_priv; int ret; + pm_runtime_get_sync(priv->dev); if (cp->type == IMX_MU_TYPE_TXDB) { /* Tx doorbell don't have ACK support */ tasklet_init(&cp->txdb_tasklet, imx_mu_txdb_tasklet, @@ -323,6 +325,7 @@ static void imx_mu_shutdown(struct mbox_chan *chan) if (cp->type == IMX_MU_TYPE_TXDB) { tasklet_kill(&cp->txdb_tasklet); + pm_runtime_put_sync(priv->dev); return; } @@ -341,6 +344,7 @@ static void imx_mu_shutdown(struct mbox_chan *chan) } free_irq(priv->irq, chan); + pm_runtime_put_sync(priv->dev); } static const struct mbox_chan_ops imx_mu_ops = { @@ -508,7 +512,27 @@ static int imx_mu_probe(struct platform_device *pdev) platform_set_drvdata(pdev, priv); - return devm_mbox_controller_register(dev, &priv->mbox); + ret = devm_mbox_controller_register(dev, &priv->mbox); + if (ret) + return ret; + + pm_runtime_enable(dev); + + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + pm_runtime_put_noidle(dev); + goto disable_runtime_pm; + } + + ret = pm_runtime_put_sync(dev); + if (ret < 0) + goto disable_runtime_pm; + + return 0; + +disable_runtime_pm: + pm_runtime_disable(dev); + return ret; } static int imx_mu_remove(struct platform_device *pdev) @@ -516,6 +540,7 @@ static int imx_mu_remove(struct platform_device *pdev) struct imx_mu_priv *priv = platform_get_drvdata(pdev); clk_disable_unprepare(priv->clk); + pm_runtime_disable(priv->dev); return 0; } |